A. Molarity . Explaining about Moles
Answer:
222.2 grams of CaCl2 in 2 moles
Explanation:
Mole=given mass/gram mass formula
2moles=x/Gram Mass Formula
(Gram Mass Formula of CaCl2):
Ca=40.1
Cl= 35.5 x 2= 71
-----------------------
GFM=111.1
2 moles = x/111.1 g
x=222.2
Calculating the molar mass of naphthalene (C10H8)
molar mass = 10 x (12.01) + 8(1.008)
= 120.1 + 8.064 = 128.164 g/mol
<u>Given:</u>
Force acting on the car moving it to the right = F1= 300 N
Force due to friction and air resistance moving it to the left = F2 = 150 N
<u>To determine:</u>
The net force on the car
<u>Explanation:</u>
Force is a vector. The force of friction acts in a direction opposite to the applied force.
If, F1 = 300N, right, then F2 = -150 N, left
Therefore, the net force acting on the car will be:
F = F1+F2 = 300 - 150 = 150 N
<u>Ans</u>: Since the force acting on the right is greater, the car will experience a net force of 150 N which will accelerate it to the right
